Mechanical movement.



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COLUMBIA PLANOGRAHI c0., WASHINGTON. D. C.

J. W. DARLEY,JR. MECHANICAL MOVEMENT- APPLICATION FILED MAR. so, 1911.

I 1,020,267. Patented Mar. 12, 1912.

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UNITED STATES PATENT OFFICE.

JOHN W. DARLEY, JR., 0]? BALTIMORE, MARYLAND, ASSIGNOR TO HAROLD A.HOLLISTER, OF SANTA BARBARA, CALIFORNIA.

MECHANICAL MOVEMENT.

To all whom it may concern:

Be it known that I, JOHN IV. DARLEY, J r., a citizen of the UnitedStates, residing at Baltimore, in the State of Maryland, have inventedcertain new and useful Improve ments in Mechanical Movements; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My present invention relates to improvements in link motions forwindmills or other motive power where the supply of power is liable tovary from time to time, and the purpose of my invention is toautomatically control the application of the power so that it may beeconomically used under widely varying conditions.

My invention is especially intended to provide an automaticstroke-controlling device, whereby a windmill may be caused to operate apump with a greater or less stroke, dependent upon the force of thewind.

My invention will be'understood by reference to the accompanyingdrawings, in which the same parts are indicated by the same lettersthroughout the several views.

Figure 1 is a diagram showing the apparatus with the driving shaft and apump connected thereto, parts being broken away. Fig. 2 shows a sectionalong the line 22 of Fig. 1, and looking down. Fig. 3 shows a sectionalong the line 33 of Fig. 1, and looking up. Fig. 4 is a view, on alarger scale, showing the link motion in the position for the maximumstroke, the parts being in the position assumed at the end of the upstroke. Fig. 5 is a similar view to Fig. 4:, showing the parts in theposition at the end of the down stroke. Fig. 6 is a similar View toFigs. 4 and 5, but shows the parts in the position for a shorter stroke,the stroke being neither the maximum nor the minimum, and the partsbeing in the position they would assume at the end of the up stroke.Fig. 7 is a similar view to Fig. 6, but shows the parts in the positionat the end of the down stroke. Figs. 8, 9, 10, 11, 12, and 13 aredetails showing different members of the link mechanism.

A represents the drive shaft, which drives the crank disk A. Obviously,a crank may be substituted for this disk, if desired. Piv- Specificationof Letters Patent.

Application filed March 30, 1911.

Patented Mar. 12, 1912.

Serial No. 617,948.

oted to this crank disk A is a connecting rod B, which is provided withthe tail piece B, shown in detail in Fig. 13, which is connected by thelink mechanism, hereinafter to be more fully described, to the similartail piece C, connected to the rod C, driving a piston which works inthe cylinder D of the pump D (see Fig. 1). Interposed between the rods Band C and the tail pieces B and G, is the link mechanism, which will nowbe described.

E represents a lever forked as at E and provided with downwardlyprojecting arms E which lever is pivoted on the two stub shafts F, andthe arms E are connected by the stub shafts E to the links K, which arepivoted as at K to the links M and Q. The link M is provided with forkedends m and m, pivoted, respectively, to the shaft K and the shaft M",and this link is also provided with lugs m". The tail piece C of theconnecting rod C is connected to the lever N, which is pivoted to thelink M by the pin M and this arm N is also pivoted to the shaft 0,journaled in the frame G, mounted on the beam H. This frame G has across bar G. The lever N is fast to the shaft 0, and also fast to thesame shaft is the arm I, carrying the adjustable weight I. Loose on theshaft O is the member P, which has forked arms P, a web P and otherforked arms P, as seen in Fig. 8, together with journal bearings 39, p,and 79 with the pin 79* and jaws p and p. The arms P are perforated asat 79 to permit the attach ment of the counterweights P which coun:terweights swing into the recesses H" in the beam H. Pivoted to the pinK is the link Q, shown most clearly in Fig. 2, which is pivoted at itsouter end to the pin Q, which passes through the holes 29 in the jaws P,see Figs. 2 and 8.

R represents a pawl, shown most clearly in Fig. 10, which pawl carries atripping arm R and a pin 1'. The coil spring R engages the pins 79 and1', and tends to press the pawl R into engagement with the teeth a ofthe curved rack S, which rack is fast to the frame G.

T represents a tripper, shown in detail in Fig. 9, which is pivoted asat t with the tail piece U, secured to the connecting rod U, leading tothe crank V, controlled by the wind vane X (see Fig. 1). Attached to thelower end of this connecting rod, is the control weight W. This tripperT projects between the jaws p and p of the member P, and is pivoted, asat t on the bearing 7) of the member P. The arm T projects upward and isadapted to engage the arm R of the pawl R, and to throw the pawl out ofengagement when the weight W drops.

The operation of my improved device is as follows :\Vhen the wind isblowing with a high velocity, the vane X is forced into the positionshown in Fig. 1, thus raising the weight W, as shown, and bringing themembers T and P to the position shown in said figure. The positions ofthese last named parts are better illustrated in Fig. 5, and it will beseen that the center of the shaft Q is directly above the center of theshaft F. During the operation of the crank shaft A, the crank pin a iscarried around in a circle, and through the connecting rod B vibratesthe lever E in a vertical plane. When the lever E is moved upwardly fromthe position shown in Fig. 5 to the position shown in Fig. 4, both ofthese positions being for the setting of the apparatus suitably for aheavy wind, the links K are moved upwardly by the stub shafts E. Theupper end of these links force the shaft K upwardly, and this shaft isguided in the arc of a circle by the link, which has a bearing on itsstub shaft Q. As the shaft K moves in the said are of a circle, it pullson the link M, and the lower end of said link, acting upon the stubshaft M vibrates the lever N in a vertical plane, and the lever N pullsupon the connecting rod C, and so reciprocates the piston of the pump D.The links Q, M, K, and their various points of attachment are soproportioned and located that the levers E and N shall have equalamplitudes of vibration. As long as the wind continues strong, the stubshaft Q will be held in the position shown in Figs. 1, 4, and 5, and theoperation of the crank shaft A will reciprocate the piston of the pump Dto its maximum extent. If, now, the wind decreases in velocity, thepressure upon the vane X is reduced and is no longer able to support theweight lV and connected parts in the position shown in Figs. 1, 4, and5. The weight lV consequently drops, moving the vane X toward the left(see Fig. 1) until the point is reached at which the pressure of thewind on said vane is able to support the weight WV. As the weight Wdrops, it will be noted that the lever V moves downwardly, and theeffective lever arm by which the weight W acts upon the vane X is theperpendicular distance between the line in which the weight W acts andthe center of the shaft upon which the vane X and lever V revolve. Asthe lever V moves downwardly, this effective lever arm at which theweight W acts upon the vane X will decrease in length and will varyapproximately as the sine of the angle the lever makes with a verticalline. Consequently, the effect of the weight W decreases as the lever Vmoves downwardly, and as the vane X moves toward the left a point isreached where a wind of moderate velocity can support the weight W inposition. As the weight W moves downwardly upon a decrease in thevelocity of the wind, the first effect is to move the shaft 5downwardly. This brings the end T of the member T against the part B ofthe pawl B. This removes the lower end of said pawl from contact withthe rack teeth S, and further downward movement of the shaft t bringsthe member T in contact with the lower aw p of the member P, and thefurther downward movement of the weight W revolves the member P upon theshaft 0, thus moving the stub shaft Q from the po sition shown in Figs.1, 4, and 5 in the arc of a circle whose center is located on the axisof the shaft 0, to the position shown in Figs. 6 and 7 which latterfigures show the position the parts would assume when the wind has onlya very moderate velocity.

For higher velocities, the position of the stub shaft Q would beintermediate between the position shown in Figs. 6 and 7 and theposition shown in Figs. 1, 4, and 5, while for still smaller velocitiesof wind the ,position assumed would be farther around in a clockwisedirection. 'A, of course, is continuing its revolution ,during thechange of air and continues. to vibrate the lever E in a vertical plane,and the action of said lever upon the link K is the same as beforedescribed, but the stub The crank shaft shaft K being moved into a newposition by the movement of the stub shaft Q just described, said stubshaft K moves in an arc of a circle located differently from that inwhich it moved before, and as the lever E moves upwardly, the stub shaftK forces the link Q toward the left. This pushes upon the shaft Q andtends to revolve the member P in a clockwise direction upon the shaft 0,but this tendency to revolution is prevented by-the pawl R, which comesinto engagement with an appropriate tooth in the series of rack teeth S,and the stub shaft K moves the upper end of the link M upwardly andrearwardly, and pulls upon the lever N as before, but by reason of theapproach of the shaft K toward the shaft F, the lever N is not vibratedto such an extent as it was in the previous instance, but it will benoted by reference to Figs. 5 and 7 that when the connecting rod 13 isin its lowest position, the position of the lever N is the same in bothfigures. It is evident that the position of the pump D, corresponding tosaid piston is only shortened on its upper side, the lowest point ofsaid stroke remaining constant no matter how much the length of saidstroke may vary. Should the wind increase in velocity, the connectingrod U will be pulled upwardly, thus pulling the right hand end of themember T upwardly and against the jaw 79 in which position the arm P isremoved from the portion R of the pawl R, and the continued upwardmovement of the link U moves the stub shaft Q from the position shown inFigs. 6 and 7 toward that shown in Figs. 1, 4, and 5, the pawl beingfree to drop into the various teeth during this movement.

The counterweights P are attached to the member P so as to provide thatthe said member and attached parts, excluding the connecting rod U, theconnecting piece U, and weight WV, can be approximately balanced uponthe shaft 0, .so that resistance to the movements caused by the vane Xand weight IV is reduced to the smallest possible amount.

At times, it may be necessary to counterbalance the weight of theconnecting rod C and attached parts, and for this purpose the lever Iand adjustable weight I are provided, so that said counterbalancing maybe effected to any desired degree.

It will be noted that when the stub shaft Q is moved downwardly andtoward the right to such an extent that the center of the stub shaft Kis in alinement with the center of the shaft F, upon which the lever Evibrates, no motion of the shaft K will result fro-m the movement of thelever E, and hence the lever N, which derives all its movements from themotion of the shaft K, will not be moved at all. To prevent the shaft Kmoving below the position at which it is in alinement with the shaft F,the stops m are provided on the link M and limit the downward motion ofsaid shaft K when they come into contact with the cross piece G of theframe G. Hence, it is evident that the lever E always vibrates to thesame amplitude during the movement of the crank A, but that the lever Nfor the very smallest velocity of wind has no move ment whatever, and asthe velocity of the wind increases the vane X is moved toward the right,and by the movement hereinbefore described the amplitude of vibration ofthe lever N is increased up to an amplitude equal to the amplitude ofvibration of the lever E. It should be noted in examining thesemovements that the locus of the center of the stub shafts E is on acircle whose center corresponds with the axis of the shaft F; the locusof the center of the shaft M is on a circle whose center is on the axisof the shaft 0; the locus of the center of the shaft Q is on a circlewhose center is on the axis of the shaft 0; and the locus of the centerof the shaft K is on a circle whose center is on the axis of the shaftQ.

lVhat is claimed is 1. In a mechanical movement, the combination of areciprocating member, means for imparting uniform length strokes to saidmember, a second reciprocating member; means connecting said memberscomprising a pair of fulcrumed levers, links connecting said levers; andautomatically controlled means for changing the position of said linksfor *arying the throw of the second member, substantially as described.

2. In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member; a pair of fulcrumed levers having connection withsaid members, means for maintaining said levers in parallel relationwhereby to obtain a uniform length stroke between said reciprocatingmembers, and automatically controlled means for maintaining said leversout of parallel relation whereby to change the length of stroke of thesecond reciprocating member, substantially as described.

In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member, levers connected with said reciprocating membersrespectively, a support on which said levers are fulcrumed, a pair ofconnected links connecting said levers and automatically cont-rolledmeans for adjusting the position of said links whereby to vary thelength of stroke of said second reciprocating members, substantially asdescribed.

4. In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member, levers connected with said members respec tively,a support on which said levers are fulcrumed, a pair of links havingpivoted connection and pivotally connected with said levers, a memberfulcrumed on said support, a link connection between said fulcrumedmember and said links, and means for changing the position of saidfulcrumed member for adjusting the position of said links whereby tovary the length of stroke of said second reciprocating member,substantially as described.

In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member, levers connected with said reciprocating membersrespectively, a support on which said levers are fulcrumed, an armfulcrumed on said support, a link connection between said arm and saidconnecting levers, means automatically operable to change the positionof said arm, means for holding said arm in adjusted position, and meansfor automatically releasing said holding means, substantially asdescribed.

6. In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member, levers connected with said reciprocating memberrespectively, a support on which said levers are fulcrumed, an armfulcrumed on said support, a link connection between said arm and saidconnecting levers, a rod connected with said arm and automaticallyoperable to change the position thereof, means for holding said arm inadjusted position, a releasing device for said holding means, and aweight carried by said rod adapted to actuate said releasing device androd and change the position of said arms, substantially as described.

7 In amechanical movement, the combination of a reciprocatingmember,means for imparting uniform length strokes to said member, asecond reciprocating member, levers connected with said reciprocatingmembers respectively, a support on which said levers are fulcrumed, anarm fulcrumed on said support, a link connection between said arm andsaid connecting levers, a rod connected with said arm and automaticallyoperable to change the position thereof, a rack bar mounted on thesupport, a pawl carried by said arm adapted to engage with said rack barand hold the arm in adjusted position, a releasing device for the pawlcarried by the arm, and a weight carried by said rod, said weightadapted to actuate said releasing device and rod and change the positionof said arm, substantially as described.

8. In a mechanical movement, the combination of a reciprocating member,means for imparting uniform length strokes to said member, a secondreciprocating member, levers connected with said reciprocating membersrespectively, a support on which said levers are fulcrumed, an armfulcrumed on said support, a link connection between said arm and saidconnecting levers, a rod connected with said arm and automaticallyoperable to change the position thereof, a rack bar on the support, apawl on said arm adapted to engage with said rack and hold said arm inadjusted position, a releasing device for said pawl, mounted on saidarm; a weight connected with said releasing device and said rod,'saidweight adapted to actuate the pawl releasing device and move the rod inone direction, and a counterbalancing weight carried by said arm at theother end thereof, substantially as described In testimony whereof Iaifix my signature, in presence of two witnesses.

JOHN IV. DARLEY, JR.

Witnesses E. H. DARLEY, L. A. DARLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, .D. G.

